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Full text of "The manufacture and properties of iron and steel"

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In. Tables XXXIII-D to L, inclusive, is given the production of coal, iron ore, iron and steel in the leading nations. In the case of some countries certain information can hardly be obtained at all, as, for instance, in regard to the production of wrought-iron or of lignite in the United States. In other cases there is much difference in the way the figures are usually given. In the United States the production of steel is the ingot weight. We do have a figure of finished rolled material, but this includes the wrought-iron. In England the ingot is also used, but in some other countries' the data :are given for the finished bar, while in Belgium the records show the weight of the blooms or billets in the intermediate stage.
Judging from my own ignorance in the matter, it is doubtful if most people appreciate the difficulty of obtaining accurate statistics of production. This will be illustrated by Table XXXIII-A, which gives figures on the output of steel in Germany. The data from Wedding were collected exclusively for this book, and as they dis-agreed with other records an investigation was made for me by Consul-General Mason in Berlin. The different figures were then-sent to Mr. Schrpdter and I asked for an explanation of what is meant by finished steel, and whether the same metal could appear twice in "Mason's tabulation. Mr. Schrodter states that not until the year 1900 were any records kept of the output of ingots, but does not cast any light on the question of, duplication. He does state, however, that the amount of finished material in 1900 was 6,361,650 tons, which is given by Mason as the total output. He also states that the total production of ingots and castings was 6,645,869. This is the same thing as saying that the weight of finished material was 95.72 per cent, of the weight of the ingots, a difference of only 4.28 per cent, to account for all scrap and oxidation, and I can hardly believe that the figures are correct.